Compound rotary pump



Aug. 26, 1.947. v A. WAI-ILE 2,426,539

Y COHPOUND ROTARY PUMP Filed Aug. 21, 1945 2 SheetsHSheet 1 INVEN TOR. HMP/f Mhz:

Aus. 26, 1947. A. wAHLE 2,426,539

courolmn ROTARY PUMP Filed Aug. 21, 1945 2 Sheets-Sheet 2 fle /8 INVENTOK HooLP/r #V9/,2f BY Patented Aug. t?, 1947 STAT E S rar OFFICE COMPOUND ROTARY PUMP Adolph Wahle, Davenport, Iowa, assigner of oneiialt to W. H. Martin, Davenport, iowa l My present invention relates to rotary pumps of the type in which the rotor has a transverse web perpendicular to `the axis of rotation and in which blades or vanes vextend outwardly substantially radially from the rotor hub and are connected thereto and to the transverse web. It re- .lates to a. pump in which a turbine type of pump is staged to a centrifugal type of pump.

Among the objects of this invention are the provision of an improved pump of the type stated; the provision of a pump of the type indicated having increased eiilciency over prior structures of this kind; the provision of a pump of the type stated in which a regenerative turbine pump and a centrifugal pump are connected in serial relation in a single structure; and such further objects, advantages, and capabilities as will hereafter appear and as are inherent in the structure disclosed herein. My invention further resides in the combination, construction, and arrangement of part-s illustrated in the accompanying drawings and, while I have shown therein what is now regarded as the preferred embodiment of this invention and a modification thereof, I desire the same to be understood as illustrative only and not to be interpreted in a limiting sense.

In the drawings annexed hereto and forming a. part hereof,

Fig. 1 represents a side elevation of a pump embodying my present invention;

Fig. 2 represents a vertical longitudinal section substantially along the plane indicated by the line 22, Fig. 1;

Fig. 3 represents a horizontal longitudinal section substantially along the plane indicated by the line 3 3, Fig. l;

`Fig. 4 represents an inside face elevation of one of the heads of this pump;

Fig. 5 represents an edge view of the structure shown in Fig. 4;

Fig. 6 represents an end view of the rotor;

Fig. 7 represents the rotor in side elevation;

Fig. 8 represents an elevation of the body of Y the pump as viewed from the left in Fig. 9;

Figs. 9 and 10 represent transverse sections of the structure shown in Fig. 8 taken, respectively,

v along the axis of the outlet and the inlet of the Fig. 14. represents an elevational view of the rotor used in a pump of the type shown in Fig. 13.

This pump comprises essentially a body I, heads 2-and 3, and a rotor 4 carried by a shaft 5. As has been indicated, the body I has heads 2 and 3 provided with protruding portions which extend interiorly of the body and fit closely therein. There is shown a water intake connector at 6 and an outletI at l. Therefore water entering at 6 goes in between the vanes or blades 8 of the rotor and tends to travel around with the rotor, Because of the size of the inlet t and the presence of the channel 9 in the body I, a greater body `of water moves with the rotor than can be accommodated in the compartments formed between the vanes 8. Therefore, there is a tendency to put pressure upon the entrapped water, and a part of the water is forced through the openings I0 in the transverse `web I I, being received in the compartments or cells I2 on the opposite side of web I I. Continued rotation of the rotor tends to force the Water out centrifugally into the channel I3 formed in the inside of the body wall. This chan# nel goes almost completely around the inside 4of the body, gradually getting deeper as it ap- `preaches.: the outlet 1. This accumulates water thrown off centrifugally by the rotor and permits the passage of more water through the holes I0 in the central web. From this it will be seen that the rotor draws water in through' the open ing 6, forcing it through the openings I0 into the compartments I2, and from here outwardly into 'the channel I3 and out of the outlet l, by centrifugal force.

In order te keep the Water on the intake side of the web or partition I I from circulating aroundwith the rotor, stop member I4 is formed on the inner face of the head 2. This stop member has a close running t with the blades on the intake side of the rotor. It is somewhat Wedge-shaped and is of a width to cover the edges of two adjacent vanes and the compartment located between them. As is clear from Fig. 1, the stop is so positioned that it cuts off the circulation of the Water at the rearward side of the inlet and forces it to go out through' the openings I0 into the compartments I2.

On account of the channel I3 in the wall of the body member, it is necessary' that this wall be reinforced by an external enlargement, this being shown at I'I in qFig. l. This is also shown clearly in Fig. 9. Bearings I5 and I6 are located in the two heads 2 and 3, respectively, to furnish a proper support for the shaft 5. Upon this shaft 5 is mounted therotor having a hub 5c.

In the modified structure shownA in Figs. 13 and 14, there is disclosed a double pump with a set of receiving compartments at each end and, in the middle, a set of compartments i2 of double the size of the corresponding compartments in Fig. 7. The outlet 1a is also larger than the outlet 1 since it must carry the water from the double capacity rotor. The channel in the inner face of the body wall is indicated in. Fig. v13 by the numeral lila and is shown as being Wider and having a larger carrying capacity than the corresponding channel I3 of the previously described construction. Except for the two inlets in -place of one, the operation is the same in the two constructions.

inlet and outlet openings thereto and therefrom, lsaid openings being offset relatively to each other longitudinally of the casing, said pump having a rotor mounted substantially axiallyof the casing,

the inner cylindrical wall of the casing having channels formed therein leading vfrom the respective openings, the planes of the channels being substantially `perpendicular to the axis of the casing, the head at the inlet end of the casing having a stop projecting inwardly substantially into contact with the rotor, said stop being located adjacent the inlet opening and rearwardly therefrom with reference to the direction of rotation of the rotor, the channel corresponding to the inlet openinghaving a decreasing cross-section as it recedes from the inlet opening, the rotor comprising a supporting and driving shaft and a hub provided with substantially radially extending blades and a substantially circular web rigidly connected to the rotor hub, perpendicular thereto and dividing the casing-into unequal comstantially the entire space between the rotor andthe head corresponding to a limited part of the internal peripheral surface of the casing at the inlet end of the casing, the inlet and outlet openings being staggered bothi longitudinally and transversely of the casing, the stop being located adjacent the inlet, the internal peripheral wall of the casing having a channel of decreasing 4 l blades being locatedv between the openings through the web..

3. In a rotary pump, a housing for the recep tion of a rotor, a rotor comprising a shaft, a transverse web, and a plurality of substantially radial blades, said web being located approximately midway between the ends of the housing, said web having openings therethrough between the blades and in proximity to the hub, said housing having an inlet on one side of said web and an outlet on the opposite side of the web, the side of the pump into which the inlet opens functioning as a turbine pump and the other side functioning as a centrifugal pump,

4. A pump of the type indicated having a casing provided -with peripheral inlet and outlet openings and a rotor mounted for rotation therein, said casing having heads, one of said heads being spaced from the rotor and having an inwardly projecting stop member located closely adjacent the inlet opening to prevent circulation of water with the rotor in the space between the rotor and the adjacent head, the stop member extending inwardly from the head substantially into contact with the rotor, the 'internal peripheral wall having a channel of diminishing size leading from 'the inlet opening in the direction of rotation of the rotor, the rotor having a web provided on its opposite faces with radial blades,

cross-section extending from the inlet opening forwardly in the direction of rotation of the rotor, there being in the internal peripheral wall of th'e casing a channel of increasing cross-section leading to the outlet opening, the rotor having a divider web integral with its hub transversely thereof and extending outwardly into close proximity to the casing wall, the web dividing the casing cavity into unequal compartments, the web having openings .therethrough connecting said compartments, the rotor having blades extending outwardly substantially radially, the

extending, with the web, substantially into engagement with the inner peripheral face of the casing, said web being provided with holes connecting the compartments between adjacent blades upon opposite sides of the web, said holes being located in the angles between the blades and serving to convey Water from the inlet to the outlet.

5. A pump of the type indicated havinga casing provided wtih peripheral inlet and outlet openings and a rotor mounted for rotation therein, said casing having heads, oneof said heads having an inwardly projecting stop member 1ocated closely adjacent, the inlet opening to prevent circulation of water with the rotor in the space between the rotor and the adjacent head, the internal peripheral wall having a channel of diminishing size leading from the inlet'opening in the direction of rotation of the rotor, and the internal peripheral wall having a channel of increasing size leading in the direction of rotation of the rotor to the outlet opening, the rotor having a web dividing the casing compartment into substantially equal compartments and being provided with transverse openings connecting the compartments upon opposite sides of the web.

6. In a pump of the type indicated, a casing having an internal peripheral surface of approximately cylindrical form, removable heads closing the ends of said casing, a rotor having a shaft rotatably mounted in said heads, said casing having a peripheral outlet and at least one peripheral inlet staggered with relation to the outlet, said rotor having a hub and the hub having blades extending outwardly substantially radially therefrom parallel with the rotor shaft, and at least one web extending outwardly from the hub into close proximity to the inner peripheral surface of the casing, said web having transverse openings connecting the compartments, upon opposite sides thereof, said transverse openings being located between the blades closely adjacent the hub.

'7. In a pump, a hollow body of approximately cylindrical form, internally, a rotor therein, said 42ans extending radially outward trom said hub into close proximity to the body wail and dividing the space within the bodyY into unequal chambers. and blades radiating from said hub secured to said web, the blades including between them tapering compartments, said web having openings therethrough adjacent the hub connecting the compartments on opposite sides oi the web, there being. between the body, the blade edges, and the adjacent head, on the intake side o! the pump, a channel which is V-shaped in crosssection, and a stop in said channel adjacent the intake opening and having a size and shape t0 substantially block the space between said head and a passing blade, the channel on the opposite side of the web, in which the blades revolve about the shaft, being rectangular in crosssection.

8. In a pump oi the type described, a hollow body oi approximately cylindrical form inside, a

rotor rotatable therein, said rotor having a hub ,o

pump, said pump having an intake opening into' the body cavity closely adjacent the stop on the forward side thereof, the blades upon `opposite sides of the web having substantially equal surfaces exposed to the huid being pumped, there being between the edges of the blades and the head at the intake side of the web a chamber which is approximately ltriangular in cross-section, said web being provided lwith uid passages,

between the blades and adjacent the rotor hub. 35 1,973,869

:o Number Name Date 1,881,839 Bui-ks June 7, 1932 1,162,848 Brush Dec. 7. 1015 v 1,418,040 Trane Hay I0, 1923,

' 6 which connect the'chambers upon opposite sides of the web, the blades upon the inlet side oi' the web being trapesoidal in iorm and those upon the opposite side thereof being substantilaly rectangular.

9. In a pump. a hollow body o! approximately -cylindrical form, internally, a rotor therein, said rotor comprisingl a shaft-supported hub. a web extending radially outward from said hub into close proximity to the body wall and dividing the space within .the body into unequal chambers, and blades radiating' from said hub secured to said web, the blades including between them tapering compartments, there being, between the body, the blade edges.` and the adjacent head, at one side of the web, a channel which is V- shaped in cross-section. and a stop in said vchannel of a size and shape to substantially block the v-shaped channel between said head and s passing blade, the channel on the opposite'side of said web, in which the blades revolve about the shaft, being rectangular in cross-section.

' ADOIPH WAHLE.

anmucas crran The following references are of record in the tile oi this patent:

UNITED STATES PATENTS 8900i' Sept. 11, 193,4 

